【Junk Item】TWSBI ECO Rose Gold Black

This is a so-called junk item, but TWSBI pens are easy to disassemble and reassemble, so how about using it for parts, such as a replacement nib?
Please check the photos, but the condition is as follows:
Nib: I don't think it's damaged, but I've used it about once a week for several months, so there's a possibility it has developed some slight wear.
Barrel: In an attempt to fix the stiff screw mechanism, some white polishing compound has become lodged inside. Also, the inside has further deteriorated due to friction with the screw's rubber component, causing it to jam. Therefore, I do not recommend using it in its current state.
Screw Mechanism: I believe this part itself is normal, but in order to remove the jammed rubber, I pushed it with a wire, leaving marks on the rubber part.
Cap: The tip is damaged, possibly due to some kind of pressure.
Case and Accessories: Unused.